Motor-driven tire-pump



G. N. GUTHREY.

MOTOR DRIVEN TIRE PUMP.

APPLICATION FILED MAR. 8. i920.

Patented Feb. 8, 1921.

2 SHEETS-SHEET I.

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W'. 'I e@ WITNESSGQ.

G. N. GUTHREY.

MOTOR DRIVEN TIRE PUMP, APPLICATION FILED MAR. 8. Iseo.

1,368, 1 39. Patented Feb. 8, 1921.

2 SHEETS-SHEET 2.

ATTORNEY 'UNITED STAMENT OFFICE.

GORDON N'. GUTHREY, OF DALLAS, TEXAS.

n MOTOR-DRIVER' TIRE-PUNT?.

l 1o all w hom it may con cern Be it lrnown that I, GORDON N. GUTHREY, acitizen of the United States, residing at Dallas, in the county ofDallas and Stateof Texas, have invented new and useful Im provements inMotor-Driven Tire-Pumps,of which the following is a specification.

The object of my present invention is the provision of a compact,efficient and durable motor-driventire pump.

To the attainment-of the foregoing, the invention consists in theimprovement as hereinafter described and definitely claimed.

In the accompanying drawings, hereby made a part hereof: 4 i

Figures 1 and 2 are complet-e longitudinal sections at right angles toeach other of my novel pump. f

Fig. 3 is a section taken in the plane 1ndicated by the line 3-3 of Fig.1, and showing the non-return valves of the pump.

Fig. 4 is a transverse section on line 4 4 of Fig. 2.

Fig. 5 is a perspective showing one piston and its complementarycross-head as connected.

Similar numerals of reference designate corresponding parts in all ofthe views of the drawing Among other elements my novel pump comprises amajor casing section 1 and an end casing section 2, connected at 3 tothe section 1. i On the casing section 2 is a handle 4 to facilitateconvenient handling of the pump, and in the casing section 2 is anelectric motor 5 the armature shaft 6 of which is provided with abeveled pinion 7. At 8 and 9 are conductors for electrically connectingthe motor 5 with a source .of electrical energy. The conductor 9includes switch members 10 and 11, carried by the casing section 2, andthe member 11 is resilient, and therefore normally rests out of contactwith the member 10. Said member 11, however, is equipped with a handle12 adapted to play through an opening 13 in the end wall of Vthe section2, and consequently all that is necessary to complete the circuitthrough ythe conductor 9 is for the operator to grasp the handle 12 andthereby hold the member 11 against `the member 10. Manifestly the handle12 will be either insulated from the switch member 11 or will be formedof insulating material. The conductors 8 and 9 are preferably covered byinsulation, and are adapted when the pump is Specification of LettersPatent.

Patented Feb. s, 1921.

Application filed March 8, 1920. Serial No. 363,981.

:to be put into use, to be electrically connected in the ordinary mannerwith the storage battery of an' automobile.

At 14 isthe cylinder section of the pump. The said section 14 isexteriorly flangedat 15 and bolted to the end of the casing section 1.In the saidsectionL 14 are formed cylinder bores 16 that extendthroi'ighout the length thereof, and' connected and opposedto the outerend ofthe section 14 are non-return valves 17 of the flap-type, therebeing one of said valves 17 to each cylinder bore 16. The inner ends ofthe cylinder bores 16 are closed by cushions 18, and guided in saidcushions are the rods 19 of pistons 20. Each of the said piston rods 19.is connected `through an appropriately `guided..cross-head 21, andinterposed between the said cross-head and ythe inner end of the cushioncomplementary to said rod is a coiled spring 22 the function of which isto move the piston rod inwardly. The crossheads 21 are opposed to theperimeters of reversely arranged cams23, and the said cams 23 are fixedwith respect to a beveled gear 24; the said beveled gear 24 beingappropriately mounted in the casing section 1, and being intermeshedwith the pinion 7. By virtue of the construction just described,

1t will be manifest that when current is supplied to the electricalmotor 5, the pistons 2() will be reciprocated and one piston will beforced outwardly coincident-with the inward movement of the other.

Threaded on the outer end of the cylinder section 14 is an elbow casingsection 30, and threaded on the outer end of the said elbow casingsection is a. cap 31 in which is an opening 32 of about the proportionaldiameter illustrated. Disposed in the outer end portion of the section30 and retained in position by the cap 31 is an annulus 33 of vulcanizedrubber or analogous material, the aperture 34 of which is of a. size toreceive the inflating tube of a tire when the said tube is crowded intothe aperture. Manifestly the iit lof the annulus 33 about the inflatingtube of the tire will be so tight as to prevent the leakage ofairbetween the tube, on the one hand, and the annulus, on the other. j

It will be gathered from the foregoing that my novel pump is susceptibleof being readily applied to and held in working position on the inlatingtube of a tire, and that it is alsojsusceptible of being readilyconnected with a source of electrical energy, so that when theswitchformed bythe mem- ,y

`vtion, a gear revoluble in the major casing sectionvandfengaged withthe gear on the bers 10 and 11 is closed, the pump will serve toexpeditiously inflate a tire.

My novel pump is designed more-espe-- cially toV be carried in the toolbox of an automobile, but it will be understood that it is within thepurview of my invention to make the pump of various sizes, one size tobe operated in a garage or in a service station,rin which event itsmotor 5 'would be either permanently or detachably connected Withthehouse wires of the garage or service station. y'

.Having described my invention, what l claim and desire to secureby-Letters-Patent is: u

In a motor-driven tire pump, a maj or casing section, an end casingsection connected to one end of the major section and having a handleand also having an opening'in its end wall, an electric motor arrangedin the end casing section and having an armature shaft and a gearthereon, conductors complementary to the electric motor, one of saidconductors comprising switch members one of which is movablerelatively'to the other and is provided with a handle movable throughthe. opening in the end casing secarmature shaft, reversely arrangedcams revoluble with saidgear, a cylinder section connected to the end ofthe major casing section remote Jfrom the end casing section and havingcylinder bores, pistons movable rectilinearly in said bores and havingrods and cross-heads on the rods, said cross-heads guided in the majorcasingsectionV and opposed to the perimeters of the cams, springs tomove they pistons inwardly, iap valves opposed and'con'nected'to theouter end of the cylinder f'section and controlling the outer ends ofthecylinders, an elbowcasing section secured on the outer end of thecylinder section, a cap'secured on the outer end of the elbow'casingsection end having an opening, and a resilient annulus secured bythe cap in the elbow casing section and havin@ an aperture adapted toreceive the inlating tube or valve tube of a tire. Y In testimonywhereof 1l aix my signature.

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